LIGO and Virgo introduce a new hunting season

two technicians with equipment

Hugh Radkins Engineers and Betsy Weaver have been working within the tracker of the tracker at LIGO Hanford Observatory, Washington, USA, during a recent refurbishment. With the update completed, the two LIGO facilities, in partnership with Virgo facility in Italy, are now ready to start the third inspection. [Image: LIGO/Caltech/MIT/Jeff Kissel] [Enlarge image]

1 April 2019—But just over three years after the first, a marked concentration of earthworms (GWs), the LIGO and Virgo laser interferometer GW vision materials today present the third visual tour.

Recognized in the GW community as just “O3,” the long-term run of the festival may deliver a wealth of new creative ideas – thanks to a 40 per cent increase in awareness of two facilities. LIGO in the United States. States and close to zealous Virgo centers in Italy. In O3 time it also saw that occasional sightings of the German KAGRA GW were occurring. And in a new version, the LIGO / Virgo Science Collaboration (LSC) will make data on the possible GW sounds that can be made publicly available in a very near time.

Strengthening the power of laser

O3's running will complement the remarkable series of milestones achieved in the first two visual GW GWs. These include finding ground waves away with ten black wavelengths, as well as hitting two huge neutron stars. The final find – co-ordinated with scenes from simpler telescopes, X-ray and rayon is an interesting example of a “multimedia message” – released in an extraordinary harvest of two t New scientific knowledge.

in front of the chimney

A member of the LIGO team, Alena Ananyeva, at the LstonO Livingston Theater, putting in “hearings” to control clay light. [Image: LIGO/Caltech/MIT/Matt Heintze] [Enlarge image]

LSC scientists are confident that LIGO and Virgo labels will submit ideas on an faster piece in O3, as a result of technical improvements made at the end of the last review period, O2, in August 2017 ( see “Wave of Tunnel: Next Step,” OPN, May 2018).

Developments include doubling the power of the facility's lasers, which are combined in the Michelson-interferometer-L position, with an interval arm of 3 to 4 km, to add to the atmosphere. build up a violent disturbance in space time that waves waves. Installed during the refurbishment there were scattered light torches, or baffles, which were designed to control clay light within these major crossings.

Sounding sound

In addition to laser power, other recent developments have concentrated on efforts to increase sensitivity by removing and eliminating sound resources in a range of sub-systems. At LIGO, this has included the major engineering challenge of exchanging a number of the 40-cg, or test, masses suspended strictly at each end of the army between – laser cutting. As wave passes past the land moving through space, tiny movement in these mirror causing changes to the length of the armor and read in the interlocutory mark. New, better versions of the mirror include better cover to reduce thermal noise.

The introduction of a Virgo exhibition

There is a view of one of the Virgo mirrors, or test masses, from the back, as a researcher removing the safety stops from the mirror after the recent refurbishment. (The reflective mirror is in the infrared area used by Virgo's infirmary, but clear for clear light.) [Image: EGO/Virgo Collaboration/Perciballi] [Enlarge image]

At Virgo, at the same time the steel wires were replaced by silica-centric versions which blocked the main mirrors and distort an earthquake and increase the capacity of our GWS base t Low and medium. And both LIGO and Virgo will now use a trick of quantum mechanics, the splash of photocopier "light" light, to make the misconceptions in access times that may be linked to variables. in quantum language.

These and other technical developments have been developed and developed at another facility, GEO 600, a smaller GW theater in Europe which has been an essential test for technologies to rob the most power of maintenance of the sites. GEO 600 will also take part in the O3 running.

Sampling more of the cosmos

fitting equipment

Researchers turn the wet light into a clean room in the waves of the wave on Virgo. [Image: © H. Lück/B. Knispel/Max Planck Institute for Gravitational Physics] [Enlarge image]

Recent sensory updates will allow the worldwide GW network to examine a slice of the cosmos which has been extended enormously for evidence of amazing astronomical events. In O3 running, for example, the LIGO awareness of recent updates should allow the possibility of cutting non-neutral double-star union to 550 million light years – more than 190 million A year longer than in O2.

That could, along with an eight-fold increase in space now seen by Virgo, increase the detection rate of two black holes to any month on a monthly basis, and two- t neutral stars to between one year and one per month. There is also potential for more unusual, less accessible events such as a black hole union and a neut star.

Access to data

The public will be able to make this available through discovery, through new software developed by LSC scientists. The software “will be able to send a public notice within five minutes” of finding a GW, according to Sarah Antier, a post-doctoral researcher at Université Paris Diderot, France.

This allows people to access parameters quickly such as the type of signal, the condition of the atmosphere and a distance of a mean GW event. These parameters then allow professional and amateur astronomers who are looking at different slices of the magnetic electromagnetic instrument to train their instruments quickly on the skyline to follow the attention of GW. .

KAGRA on the way?


Part of one of the KAGRA's mediated members of the army, built in 2015. [Wikimedia Commons/Christopher Berry]

The possibility of locating GW sources quickly and in some detail could be lifted up later in the O3 period of a year, with the first KAGRA round. A modern 3-storey horizontal underground design laboratory incorporates suspended test pumps with a 20-to-20 cooler temperature, KAGRA has been built in Japan since 2010. t its development has been hampered by the continuing difficulty of releasing an earthquake sound to cooling cement and even running water into the souterrain.

In January this year, however, the KAGRA team said the body had a successful 10-day test between cryogenic temperature. With that important milestone behind, the team hope that the science will make its first scientific ideas at the end of 2019.

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